The math is brutal and more common than people think. A driver blows a stop sign, totals your car, and puts you in the hospital — and then you learn the person who hit you carries the Texas minimum, $30,000 in bodily-injury coverage. Your medical bills already passed that before you left the emergency room. So where does the rest come from?
For a lot of Texans, the answer is sitting in their own auto policy, in a line item they barely remember agreeing to: underinsured motorist coverage. Here’s how it actually works in Texas — and why the insurer you’ve paid for years can end up on the other side of the table.
What underinsured motorist coverage is
Underinsured motorist (UIM) coverage is part of your own auto policy. It’s designed for exactly the situation above: the person who hurt you is at fault, but their liability insurance isn’t enough to cover what you’ve lost. UIM steps in to make up some of the difference, up to the limits you bought. Its close cousin, uninsured motorist (UM) coverage, does the same job when the at-fault driver had no insurance at all or fled the scene.
Here’s the part most people don’t realize: Texas law requires your insurer to offer you UM/UIM coverage when you buy a policy. You only go without it if you turned it down in writing. That means a great many Texas drivers have this coverage and have simply forgotten — which is why, after a serious wreck, one of the first things worth doing is pulling your own declarations page to see what you’re carrying.
When a driver counts as “underinsured”
A driver is underinsured when their liability limits aren’t enough to cover your damages. Texas only requires drivers to carry 30/60/25 — $30,000 per injured person, $60,000 per crash, and $25,000 for property damage. Those are floors, and in a wreck involving a serious injury, surgery, or a long recovery, they get exhausted fast.
When that happens, your UIM coverage can pick up where the at-fault driver’s policy stops — but not dollar-for-dollar on top of it. Your UIM carrier gets a credit for the at-fault driver’s liability limits in calculating what you can recover under UIM — even if you never actually collected those limits. In plain terms: if you have $100,000 in UIM coverage and the at-fault driver had the $30,000 minimum, your UIM exposure is the gap, not the full hundred stacked on top. Understanding that offset early keeps expectations honest and shapes how a claim is built.
Why your own insurer can fight you — the Brainard problem
This is the part that catches injured people off guard. You’d think a claim against your own insurance would be friendly. It isn’t, and Texas law is the reason.
Under the Texas Supreme Court’s decision in Brainard v. Trinity Universal Insurance Co., a UIM carrier has no contractual duty to pay until you establish two things: that the other driver was legally at fault, and the amount of your damages. Until that’s nailed down — by a judgment or by the carrier’s agreement — your insurer doesn’t technically owe you anything. So even though UIM is “first-party” coverage you paid for, the company has every incentive to dispute fault, dispute your injuries, and make you prove the case as if it were the defendant. In effect, you may have to prove the at-fault driver’s negligence against your own insurance company.
That’s not a glitch; it’s how the system is structured. It’s also why a UIM claim is rarely a matter of mailing in a form and waiting for a check.
Allstate v. Irwin and the path to attorney’s fees
There’s a more hopeful development. In Allstate Insurance Co. v. Irwin (2021), the Texas Supreme Court confirmed that an injured person can use a declaratory-judgment action — under the Uniform Declaratory Judgments Act — to have a court decide the liability and damages questions that control UIM coverage. Importantly, that route may allow the insured to recover attorney’s fees under Tex. Civ. Prac. & Rem. Code § 37.009.
The word “may” is doing real work there. Fees under the Declaratory Judgments Act are discretionary, not automatic — a judge can award what’s reasonable, necessary, equitable, and just, but isn’t required to. Still, Irwin gave UIM claimants a recognized way to force the issue and put fee pressure on a carrier that drags its feet. For someone whose insurer is stonewalling, that matters.
What to do if the at-fault driver was underinsured
A few practical moves protect a UIM claim in Texas:
- Find out what you have. Pull your own policy’s declarations page and look for UM/UIM coverage and the limits. Don’t assume you don’t have it — you likely had to decline it in writing.
- Tell your own insurer about the crash promptly. UIM coverage comes with notice and cooperation requirements; sitting on it can create problems later.
- Don’t settle with the at-fault driver’s insurer in a vacuum. Settling and releasing the at-fault driver can jeopardize your UIM claim if it wipes out your insurer’s subrogation rights. Before you sign anything, your UIM carrier generally needs to be in the loop — getting this step wrong can cost you the coverage entirely.
- Mind the deadlines. Your claim against the at-fault driver is generally subject to a two-year statute of limitations in Texas under Tex. Civ. Prac. & Rem. Code § 16.003. The deadline for the UIM portion is governed by contract principles and is less clear-cut after Brainard — the claim doesn’t fully mature until you establish liability and underinsurance — which is exactly why you don’t want to wait to sort it out.
- Keep your records. Medical bills, the crash report, photos, and proof of lost income all become the evidence you’ll need to establish damages — the thing Brainard says you have to prove before your insurer owes a dime.
Talk to a Fort Worth car accident lawyer
An underinsured-driver case is really two fights at once: the wreck itself, and a coverage battle with your own insurance company that the law lets them treat like a courtroom opponent. Our Fort Worth car accident lawyers handle both — proving fault and damages, protecting your UIM rights before a hasty settlement destroys them, and pushing back when a carrier hides behind Brainard to delay. The consultation is free, and you pay nothing unless we win. Call Patterson Law Group today.
This post is for general information only and is not legal advice. Texas insurance law is complex and continues to develop, and every case is different. Consult a licensed attorney about your specific situation.